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Ink jet recording method, recording unit and ink jet recording apparatus

  • US 6,663,237 B2
  • Filed: 08/31/2001
  • Issued: 12/16/2003
  • Est. Priority Date: 09/04/2000
  • Status: Expired due to Fees
First Claim
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1. An ink jet recording method having steps of giving energy to ink, discharging the ink from a recording head and depositing the ink on a recording medium,wherein said ink is ink containing a coloring material including at least self-dispersing carbon blacks, which are formed of at least one hydrophilic group bonded to a surface of a carbon black directly or via another atom group, and an aqueous medium and further having potassium ions at 0.6% or more in a mass ratio with respect to said carbon blacks, and said recording head includes a discharge portion for discharging liquid droplets having a heating element for generating thermal energy for generating a bubble in liquid;

  • a discharge port that is a portion for discharging said liquid;

    a liquid flow path communicating to said discharge port and having a bubble generation area for generating a bubble in liquid; and

    a movable member that is provided facing said bubble generation area and is displaced following growth of said bubble, and said ink is supplied to said liquid flow path and discharged from said discharge port by thermal energy from said heating element.

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